In order to make a decent design we need to be creative and be organized. To do so, we are going to make a list of tasks:

LIST OF  TASKS

Day 1	We need to have the materials
Day 2	We need to use a drill for making holes
Day 3	We use the silicon
Day 4	Think of the design
Day 5	Connect the cables – 1st circuit
Day 6	Connect the cables – 2nd circuit
Day 7	Check for any imperfections
Day 8	Correct the imperfections
Day 9	Final Product

Keep in mind that your list of tasks does not have to necessarily be like the one above. Yours can be either longer or shorter, with more or less days!

Now, it is time to calculate the budget! Here is an example:

BUDGET

Component	Cost/Units	Units	Total cost
Gear motor	4,29	2	8,58
Idle Wheel	1,75	1	1,75
Yellow LED	0,1502	4	0,6008
Red LED	0,1502	4	0,6008
220 Ohms resistor	0,0042	8	0,0336
Battery	1,69	3	5,07
Two-way switch with 2 positions	3,18	3	9,54
Normally open push switch	1,04	4	4,16
Wires	2,234	2	4,468
Plywood plate or sheet. Dimensions (300*3*300)	5,69	1	5,69
Hot melt adhesives glue silicone bars	0,216	4	0,864
Connector blocks (12 connections)	0,95	1	0,95
Electrical tape	1,03	1	1,03
Tin	11,99	1	11,99
Clips	1,61	1	1,61
Velcro	1,6	1	1,6
Fret saw replacement blades	0,403	8	3,224
Bolt and nuts	0,916	8	7,328
Recycled cardboar plates	0	4	0
Paints	0,832	12	9,984
TOTAL			79,0732